In a small pot add brown sugar, smoked paprika, onion & garlic powder, thyme, salt, cayenne pepper, black pepper and olive oil and combine until a paste forms. Add a dash more oil if you need to loosen up the paste slightly.
In a large mixing bowl combine chicken with the seasoning paste. I recommend using your hand, just to get as even coverage as possible.
On an oiled wire rack above a baking tray with foil space out the chicken drumsticks, ensuring the meatiest part with the most skin is facing up. Grab a brush and brush over all of the leftover seasoning/oil in the mixing bowl.
Pop in the oven at 220C/425F for 35mins or until crispy, lightly charred and piping hot through the centre (a thermometer at the thickest part next to the bone should read 75C/165F). You can flip them with 10-15mins cooking time to go to crisp the underneaths if you wish.
